The nylon-tipped rotary friction screw is nice and fits great. Seems like a nice touch compared to the nylon screw that is standard. The second screw in the kit does not appear to fit anything on my vise! The package says it is for the bobbin-holder, but the brass screw is twice the size of the original screw there. It is the correct diameter and thread to fit in the height adjustment screw of the C-Clamp, but it is too short. Possibly I have an early model bobbin rest or something. I really like my Peak vise, but I think the brass screws should come standard, and I think if Peak sells them as accessories, they should both fit somewhere. [J. Stockard FF replies...We contacted PEAK Fishing about this problem and turns out that newer PEAK vises take 2 screws the same size, whereas older versions like Joel's need 2 different sizes of screw. PEAK has sent a smaller brass screw directly to Joel to resolve this issue. - James, Customer Service]